JPH0437272Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a lubrication and cooling device for sliding parts of a plunger type compressor. More specifically, the present invention relates to a device for lubricating and cooling a sliding part between a cylinder and a plunger with oil mist.

[Prior Art] Generally, a plunger type compressor is well known, which includes a cylinder block, a cylinder formed in the cylinder block, and a plunger that reciprocates within the cylinder. In this type of compressor, a packing is interposed in the sliding portion between the cylinder and the plunger. This packing prevents the fluid to be compressed from escaping from the sliding portion, thereby maintaining the compressibility of the compressor.

Conventionally, in order to lubricate between the plunger and the gasket, an oil cup method in which oil is automatically supplied from a cup, an oil bath method in which the plunger is immersed in oil, etc. have been used.

[Problems to be solved by the invention] Incidentally, in a compressor, the packing and plunger are subject to severe deformation and wear due to frictional heat caused by sliding. Further, foreign matter is likely to get mixed in between the seal and the plunger. If foreign matter enters, the seal and plunger will be severely worn out due to friction.

However, in the conventional example, since only oil is used, it only has a lubricating effect, and is not very useful against wear due to heat and wear due to foreign matter. That is, the cooling of the heat is hardly considered.

Furthermore, in the oil cup method, the oil drips slowly and naturally permeates between the seal and the plunger, so the permeation speed is also slow and there is a problem that the lubricating effect is insufficient. Even in the oil bath method, since the same oil is used for a long time, there is a problem that the lubricating effect deteriorates due to aging of the oil, and there is also a problem that the oil does not completely spread to the sliding parts.

As mentioned above, in the conventional example, the lubricating effect of the sliding parts of the compressor is insufficient, and the packing and plunger are completely unprotected from wear and tear due to heat and foreign matter, resulting in the problem that the packing needs to be replaced more frequently. .

The purpose of this invention is to provide a compressor wear prevention device that improves the lubrication effect between the packing and the plunger in a plunger type compressor and prevents wear and tear on the packing and the plunger due to heat and foreign matter. .

[Means for solving the problem] In order to solve the above problem, the following measures are taken.

A plunger type compressor comprising a cylinder block, a cylinder formed in the cylinder block, a plunger that reciprocates within the cylinder, and a packing interposed in a sliding part between the cylinder and the plunger. An oil mist introduction port is formed in the cylinder block toward a sliding portion between the packing and the plunger, and a sliding portion between the plunger and the packing is formed through the oil mist introduction port. The oil mist pumping device is equipped with an oil mist pumping device that sends oil in the form of a mist using compressed air, and this oil mist feeding device is equipped with an oil mist retribucator that sends the oil in the form of a mist using compressed air, and an oil mist feeding device that sends the oil in the form of a mist using compressed air. a compressed air source connected to the lubricator regulator, an oil tank serving as an oil source connected to the oil mist rebricator, and the compressed air source and the This is a lubrication/cooling device for a plunger type compressor, characterized in that it includes an oil tank regulator that is located between the oil tank and the oil tank and adjusts the pressure within the oil tank.

It is effective to have an oil pocket formed between the gasket and the plunger for introducing the oil mist.

[Operation] Oil mist is introduced from the oil mist pumping device through the oil mist inlet of the cylinder block. This oil mist enters the sliding part between the seal and the plunger. The oil in this oil mist lubricates the sliding part between the seal and the plunger. Moreover, the air in the oil mist cools the seal and the plunger. Furthermore, the oil in the oil mist and the compressed air effectively remove foreign matter between the seal and the plunger.

The oil mist properties (for example, the mixing ratio of oil and gas, the partial pressure of oil and gas, etc.) can be freely changed using the oil mist pumping device.
Depending on the condition of the compressor, it is possible to prioritize lubrication, cooling, or foreign matter removal.

Furthermore, the pressure in the oil tank can be efficiently increased by the oil tank regulator, so that the properties of the oil mist supplied from the oil mist retribucator to the sliding portion between the packing and the plunger can be easily adjusted.

[Example] An example of this invention will be described below with reference to the drawings. FIG. 1 shows an example of a plunger type compressor 1. As shown in FIG. The compressor 1 has a crankshaft 2 connected to an appropriate prime mover (not shown) inside the compressor 1 . A plunger 8 is connected to the crankshaft 2 via a crank 3, a pin 4, a slider 5, a connecting rod 6, a coupling ring 7, and the like. This plunger 8 is connected to the cylinder 1 of the cylinder block 9.
0 so that it can freely reciprocate. Plunger 8
is a piston for compressing compressed air.

The suction port 11 is a suction port for sucking fluid. The suction valve mechanism 12 is a valve mechanism for sucking in air from the suction port and closing it during compression. The discharge port 13 is a discharge port that discharges compressed fluid. The discharge valve mechanism 14 is a discharge valve mechanism for this purpose.

Between the plunger 8 and the cylinder 10,
A packing 15 having a dogleg-shaped cross section is interposed. The biasing spring 16 is a rubber biasing spring that pressurizes the gasket 15. Similarly, a sliding bearing 17 is screwed into the cylinder 10. This sliding bearing 17 is screwed into the cylinder 10 to push the packing 15 toward the valve side.

Here, problems arise such as friction between the seal 15 and the plunger 8, frictional heat, and intrusion of foreign matter. Therefore, in this invention, an oil mist pumping device A is provided at the sliding portion between the plunger 8 and the packing 15 as follows, to send oil in the form of a mist using compressed air. The oil mist pumping device A will be described with reference to FIG. 1 and FIG. 2. Note that in FIG. 2, the same reference numerals as in FIG. 1 indicate the same elements.

As shown in FIG. 1, an oil mist inlet 18 is formed in the cylinder block 9. Furthermore, an air pocket 19 is formed in the cylinder block 9. A plurality of air pockets 19 are provided on the outer periphery of the plunger 8 and communicate with each other so that the oil mist can penetrate sufficiently. The air pocket 19 is directed toward the sliding portion between the gasket 15 and the plunger 8. A punch hole 20 is formed in the lower part of the air pocket 19.

An oil pan 21 is disposed below this hole 20. The vent hole 20 is a hole for discharging used oil. In this example, three compressors 1 are installed in parallel to increase the compression ratio, as shown in FIG. The front stage of each compressor 1 is connected via a mist piping 22 to an oil mist retribucator 23 that atomizes oil using compressed air. The oil mist rebricator 23 is a well-known device that drips oil onto compressed air from an air tank to form a mist.

On the front stage side of this oil mist rerivrator 23, along the first air pipe 24, there is a lubricator regulator 25 that adjusts the pressure of the compressed air flowing into the oil mist retribucator 23, and a filter that removes dust from the compressed air. 26, an electromagnetic valve 27 for communicating or cutting off the compressed air in the air tank, and an air tank 28 for the compressed air.

From the first air pipe 24 between the air filter 26 and the lubricator regulator 25 to the second
The air piping 29 is branched. This second air pipe 29 connects the oil tank regulator 3
0 to an oil tank 31 which is an oil source.

The pressure inside the oil tank 31 is increased by compressed air introduced through the second air pipe 29. Oil tank regulator 30
is for adjusting the pressure of compressed air supplied into the oil tank 31. An oil pipe 32 is connected between the oil tank 31 and the oil mist retribucator 23. Via this oil piping 32, pressurized oil in the oil tank 31 is fed under pressure to the oil mist retribucator 23.

That is, an oil feeding means is configured that feeds oil from the second air pipe 29 and the oil pipe 32 connected to the oil tank 31 to the oil mist retribucator 23. Needle valve 33
is a needle valve for adjusting the amount of oil dripping from the oil mist retribucator 23. Drop window 34
is a drip window for visually checking the amount of oil dripping. The air drain 35 is an air drain that drains the air remaining in the air tank 28 after use.

Operation This embodiment configured as described above operates as follows.

A crankshaft 2 of the compressor 1 is rotated by a suitable prime mover (not shown). The drive of the crankshaft 2 is transmitted to the plunger 8 via the crank 3, pin 4, slider 5, connecting rod 6, and coupling 7. The plunger 8 reciprocates around the cylinder 10. This reciprocating motion of the plunger 8 causes the suction valve mechanism 12 and the discharge valve mechanism 14 to operate, sucking in fluid from the suction port 13, compressing it with the plunger 8, and then discharging the compressed fluid from the discharge port 13.

During operation of the compressor 1, it is necessary to deal with frictional resistance on the sliding surface between the outer circumferential surface of the plunger 8 and the packing 15 having a dogleg-shaped cross section, frictional heat, and intrusion of foreign matter. Therefore, in this invention, the following appropriate lubrication, cooling, and foreign matter removal are performed. Referring to FIG. 2, electromagnetic valve 27 is opened, and after the compressed air in air tank 28 is cleaned of dust by filter 26, it is sent to oil mist rebricator 23 via rebricator regulator 25.

On the other hand, compressed air is supplied from the first air pipe 24 to the second air pipe 24.
It branches into an air pipe 29 and is introduced into an oil tank 31 via an oil tank regulator 30. As a result, the pressure inside the oil tank 31 is increased. Then, the oil in the oil tank 31 passes through the oil pipe 32 to the oil mist retribucator 2.
3 is sent. Oil is supplied to the compressed air in the oil mist relibrator 23 and becomes a mist (generating oil mist). The oil mist is sent to the compressor 1 via the mist pipe 22.

Note that the pressure of the compressed air for the oil mist is adjusted by operating the lubricator regulator 25. Further, the amount of oil in the oil mist can be adjusted from the oil tank 30 by operating the needle valve 33 of the oil mist retribucator 23, and its flow can be visually confirmed from the drip window 34.

Referring again to FIG. 1, oil mist is introduced into the air pocket 19 from the mist pipe 22 through the oil mist inlet 18 of the cylinder block 9. This oil mist enters the sliding portion between the packing 15 and the plunger 8.

The oil in this oil mist is Patsukin 15
The sliding parts between the plunger 8 and the plunger 8 are lubricated. Also,
The air in the oil mist cools the packing 15 and plunger 8. Furthermore, the oil in the oil mist and the compressed air effectively remove foreign matter between the packing 15 and the plunger 8. The properties of the oil mist (for example, the mixing ratio of oil and gas, the partial pressure of oil and gas, etc.) can be freely changed using the oil mist pumping device, and depending on the condition of the compressor, it can be used for lubrication or cooling. , or removal of foreign matter. The oil mist escapes from the end between the gasket 15 and the plunger 8 together with foreign matter, and also escapes from the hole at the bottom of the air pocket 19. The discharged oil is retained in the oil pan 21. After use,
The remaining air in the air tank 28 is removed by operating the air drain 35.

Advantages The above embodiment has the following advantages.

Since the oil is sent to the sliding part between the packing 15 and the plunger 8 under high pressure of compressed air, the oil is reliably distributed over the entire sliding part in a short time, improving lubricity. Since oil is continuously fed, there is no problem of oil deterioration due to aging. The gasket 15 and plunger 8 are cooled by the continuously sent air. Compressed air and oil are continuously pumped, and foreign matter between the packing 15 and the plunger 8 is removed.

And the properties of the oil mist (for example, the mixing ratio of oil and gas, the partial pressure of oil and gas, etc.)
can be changed freely using an oil mist pumping device, and depending on the condition of the compressor, it is possible to give priority to lubrication, cooling, or foreign matter removal.

An air pocket 19 is formed in the outer circumferential direction of the plunger 8. Therefore, oil mist can be sent between the packing 15 and the plunger 8 in a short time. From the above, it is possible to suppress wear and tear on the packing 15 and the plunger 8 due to friction between the packing 15 and the plunger 8, frictional heat, and entry of foreign matter.

[Effects of the invention] In the invention described above, oil mist is introduced from the oil mist pumping device through the oil mist inlet of the cylinder block, and enters the sliding portion between the packing and the plunger. The oil in the oil mist lubricates the sliding parts between the seal and the plunger. Moreover, the air in the oil mist cools the seal and the plunger. Furthermore, the oil in the oil mist and the compressed air effectively remove foreign matter between the seal and the plunger.

In this case, the properties of the oil mist (for example, the mixing ratio of oil and gas, the partial pressure of oil or gas, etc.)
can be changed freely using an oil mist pumping device, and depending on the condition of the compressor, it is possible to give priority to lubrication, cooling, or foreign matter removal.

Therefore, wear between the seal and the plunger,
It is possible to suppress wear and tear on the seal and plunger due to frictional heat and foreign matter intrusion.

[Brief explanation of drawings]

The figures show one embodiment of this invention. Figure 1a is a vertical cross-section of the compressor and a schematic diagram of the oil mist pumping device, Figure 1b is an enlarged view of part b of Figure 1a, and Figure 1b is an enlarged view of part b of Figure 1a.
The figures are a schematic diagram of the compressor and a system diagram of the oil mist pumping device. 1... Compressor, 8... Plunger, 9... Cylinder block, 10... Cylinder, 15... Packing, 18... Oil mist inlet, 19... Air pocket, 20... Vent hole, 21... Oil Pan, 22...Mist piping, 23...Oil mist retribucator, 24...First air piping, 25...
...Regulator for rebricator, 26...Filter, 27...Solenoid valve, 28...Air tank, 29
...Second air piping, 30...Regulator for oil tank, 31...Oil tank, 32...Oil piping.

Claims (1)

[Claims for Utility Model Registration] 1. A cylinder block, a cylinder formed in this cylinder block, a plunger that reciprocates within this cylinder, and a packing interposed in a sliding part between the cylinder and the plunger. A plunger type compressor comprising: an oil mist inlet formed in the cylinder block toward a sliding portion between the packing and the plunger; and an oil mist pumping device that sends oil in the form of a mist using compressed air to the sliding portion between the seal and the gasket, and the oil mist feeding device is an oil mist reblikator that sends the oil in the form of a mist using the compressed air. , a lubricator regulator that adjusts the pressure of the compressed air introduced into the oil mist retribucator, a compressed air source connected to the lubricator regulator, and an oil source connected to the oil mist rebricator. A lubrication/cooling device for a plunger type compressor, comprising: a tank; and an oil tank regulator that is located between the compressed air source and the oil tank and adjusts the pressure in the oil tank. 2. The lubrication/cooling device for a plunger type compressor according to claim 1, further comprising an oil pocket formed between a packing for introducing the oil mist and the plunger.